<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域-->
      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template #default="scope">
            <el-row :class="['vcenter', 'bdbottom', i1 === 0 ? 'bdtop' : '']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!--一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限-->
                <el-row :class="['vcenter', i2 !== 0 ? 'bdtop' : '']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag :class="[i3 === 0 ? '' : 'bdtop']" v-for="(item3, i3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template #default="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--添加角色对话框-->
    <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addRoleDialogClosed">
      <el-form :model="addRoleDialogForm" ref="addRoleDialogFormRef" label-width="80px" :rules="addRoleDialogRules">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleDialogForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleDialogForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer">
        <el-button type="primary" @click="addRole">确 定</el-button>
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
      </div>
    </el-dialog>
    <!--编辑角色的对话框-->
    <el-dialog title="编辑角色" width="50%" :visible.sync="editDialogVisible">
      <el-form ref="editRoleDialogFormRef" :model="editRoleDialogForm"  label-width="80px" :rules="editRoleDialogRules">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleDialogForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleDialogForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <template v-slot:footer>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        <el-button type="info" @click="editDialogVisible = false">取 消</el-button>
      </template>
    </el-dialog>
    <!--设置权限的对话框-->
    <el-dialog title="分配权限" width="50%" :visible.sync="setRightDialogVisible" @close="setRightDialogClosed">
      <!--树型控件-->
      <el-tree :data="rightsList" :props="treeProps" :show-checkbox="true" node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <template v-slot:footer>
        <el-button type="primary" @click="allotRights">确 定</el-button>
        <el-button type="info" @click="setRightDialogVisible = false">取 消</el-button>
      </template>
    </el-dialog>
  </div>
</template>

<script>

export default {
  data () {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制添加用户框的显示与隐藏
      addRoleDialogVisible: false,
      // 添加角色对话框的表单
      addRoleDialogForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addRoleDialogRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名称的最小长度在3~10个字符之间', trigger: 'blur' }
        ]
      },
      // 修改表单时查询到的角色对象
      editRoleDialogForm: {},
      // 修改表单的验证规则对象
      editRoleDialogRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名称的最小长度在3~10个字符之间', trigger: 'blur' }
        ]
      },
      // 控制编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据，打开分配权限的时候才获取
      rightsList: [],
      // 树形空间的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认勾选的节点id数组，三级权限id
      defKeys: [],
      // 当前即将分配权限角色id
      roleId: ''
    }
  },
  created () {
    // 获取所有角色的列表
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('/roles')
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.roleList = res.data
    },
    // 添加角色
    async addRole () {
      const { data: res } = await this.$http.post('/roles', this.addRoleDialogForm)
      if (res.meta.status !== 201) return this.$message.error('添加角色失败')
      this.$message.success('添加角色成功')
      this.addRoleDialogVisible = false
      // 重新获取角色
      await this.getRolesList()
    },
    // 关闭对话框或者取消对话框会重置重置表单
    addRoleDialogClosed () {
      this.$refs.addRoleDialogFormRef.resetFields()
    },
    // 展示编辑角色的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败')
      this.editRoleDialogForm = res.data
      this.editDialogVisible = true
    },
    // 修改角色信息
    async editRoleInfo () {
      const { data: res } = await this.$http.put('roles/' + this.editRoleDialogForm.roleId, {
        roleName: this.editRoleDialogForm.roleName,
        roleDesc: this.editRoleDialogForm.roleDesc
      })
      if (res.meta.status !== 200) return this.$message.error('修改失败')
      this.editDialogVisible = false
      await this.getRolesList()
      this.$message.success('修改成功')
    },
    // 根据ID删除角色
    async removeRoleById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除角色，是否继续', '提示', {
        confirmButtonText: '确认',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => {
        return err
      })
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.$message.success('角色删除成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作会永久删除该文件，是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => {
        return error
      })
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList() 不建议这么干
      // 直接给当前数据赋值即可
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限失败')
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      console.log('权限列表', this.rightsList)
      //
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有三级权限的id，并且保存到数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性，就是三级节点
      if (!node.children) return arr.push(node.id)
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框关闭的事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style scoped lang="less">
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

// 让权限标签纵向居中对齐
.vcenter {
  display: flex;
  align-items: center;
}
</style>
